UTILS Private functions

Functions
static uint32_t	UTILS_GetPLLOutputFrequency (uint32_t PLL_InputFrequency, LL_UTILS_PLLInitTypeDef *UTILS_PLLInitStruct)
	Function to check that PLL can be modified.
static ErrorStatus	UTILS_EnablePLLAndSwitchSystem (uint32_t SYSCLK_Frequency, LL_UTILS_ClkInitTypeDef *UTILS_ClkInitStruct)
	Function to enable PLL and switch system clock to PLL.
static ErrorStatus	UTILS_PLL_IsBusy (void)
	Function to check that PLL can be modified.

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Function Documentation

static ErrorStatus UTILS_EnablePLLAndSwitchSystem	(	uint32_t	SYSCLK_Frequency,
		LL_UTILS_ClkInitTypeDef *	UTILS_ClkInitStruct
	)		[static]

Function to enable PLL and switch system clock to PLL.

Parameters:

SYSCLK_Frequency	SYSCLK frequency
UTILS_ClkInitStruct	pointer to a LL_UTILS_ClkInitTypeDef structure that contains the configuration information for the BUS prescalers.

Return values:

An	ErrorStatus enumeration value: SUCCESS: No problem to switch system to PLL ERROR: Problem to switch system to PLL

Definition at line 844 of file stm32l4xx_ll_utils.c.

References __LL_RCC_CALC_HCLK_FREQ, LL_UTILS_ClkInitTypeDef::AHBCLKDivider, LL_UTILS_ClkInitTypeDef::APB1CLKDivider, LL_UTILS_ClkInitTypeDef::APB2CLKDivider, assert_param, IS_LL_UTILS_APB1_DIV, IS_LL_UTILS_APB2_DIV, IS_LL_UTILS_SYSCLK_DIV, LL_RCC_GetSysClkSource(), LL_RCC_PLL_Enable(), LL_RCC_PLL_EnableDomain_SYS(), LL_RCC_PLL_IsReady(), LL_RCC_SetAHBPrescaler(), LL_RCC_SetAPB1Prescaler(), LL_RCC_SetAPB2Prescaler(), LL_RCC_SetSysClkSource(), LL_RCC_SYS_CLKSOURCE_PLL, LL_RCC_SYS_CLKSOURCE_STATUS_PLL, LL_SetFlashLatency(), and LL_SetSystemCoreClock().

Referenced by LL_PLL_ConfigSystemClock_HSE(), LL_PLL_ConfigSystemClock_HSI(), and LL_PLL_ConfigSystemClock_MSI().

static uint32_t UTILS_GetPLLOutputFrequency	(	uint32_t	PLL_InputFrequency,
		LL_UTILS_PLLInitTypeDef *	UTILS_PLLInitStruct
	)		[static]

Function to check that PLL can be modified.

Parameters:

PLL_InputFrequency	PLL input frequency (in Hz)
UTILS_PLLInitStruct	pointer to a LL_UTILS_PLLInitTypeDef structure that contains the configuration information for the PLL.

Return values:

PLL	output frequency (in Hz)

Definition at line 772 of file stm32l4xx_ll_utils.c.

References assert_param, IS_LL_UTILS_PLL_FREQUENCY, IS_LL_UTILS_PLLM_VALUE, IS_LL_UTILS_PLLN_VALUE, IS_LL_UTILS_PLLR_VALUE, IS_LL_UTILS_PLLVCO_INPUT, IS_LL_UTILS_PLLVCO_OUTPUT, LL_UTILS_PLLInitTypeDef::PLLM, LL_UTILS_PLLInitTypeDef::PLLN, and LL_UTILS_PLLInitTypeDef::PLLR.

Referenced by LL_PLL_ConfigSystemClock_HSE(), LL_PLL_ConfigSystemClock_HSI(), and LL_PLL_ConfigSystemClock_MSI().

static ErrorStatus UTILS_PLL_IsBusy

(

void

)

[static]

Function to check that PLL can be modified.

Return values:

An	ErrorStatus enumeration value: SUCCESS: PLL modification can be done ERROR: PLL is busy

Definition at line 803 of file stm32l4xx_ll_utils.c.

References LL_RCC_PLL_IsReady(), and LL_RCC_PLLSAI1_IsReady().

Referenced by LL_PLL_ConfigSystemClock_HSE(), LL_PLL_ConfigSystemClock_HSI(), and LL_PLL_ConfigSystemClock_MSI().